INTERNATIONAL. STANDARD. ISO. Second edition. Calculation of load capacity of spur and helical gears —. Part 2: Calculation of surface. ISO CALCULATION OF LOAD CAPACITY OF SPUR AND HELICAL GEARS – PART 2: CALCULATION OF SURFACE DURABILITY (PITTING). ISO FRENCH: French Language – CALCULATION OF LOAD CAPACITY OF SPUR AND HELICAL GEARS – PART 2: CALCULATION OF SURFACE.
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In the case of planetary gearing, the individual gears are dependent on each other and the gearing must be handled as a whole, including the respective constraining conditions see below. Operating pitch diameter MK Help Center Find new lso papers in: Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing.
In this calculation, except sac and sat, are proposed other material parameters that are necessary for calculating the gearing.
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For undated references, the latest edition of the referenced document including any amendments applies. In the formulas, indexes 1 and 2 are used for a pinion and a wheel which is a pair: St, V, GGG perl. The planets may have one, two or more gearings. This is a free 10 page sample.
Therefore it is possible to set the maximum limit for the calculation pre-set to 5. Since it has no meaning to correct the gear rack in this case, only the pinion correction is possible axial distance, gear condition and strength parameter improvement.
BS ISO 6336-2:2006
Design considerations to prevent fractures emanating from stress raisers in the tooth flank, tip chipping and failures of the gear blank through the web or hub will need to be analyzed by general machine design methods.
The rating formulae in ISO are not applicable to other types of gear tooth deterioration such as plastic yielding, scuffing, case crushing, welding and wear, and are not applicable under vibratory conditions where there may be an unpredictable profile breakdown. Strength and quality of materials ISOCalculation of load capacity of spur and helical gears — Part 6: Uneven load distribution is caused by an elastic deformation of gears and housing, manufacturing deviations and thermal distortion.
These two values are then used to calculate the power and torque transferred via the pinion. Methods, principles and assumptions are given in standard ISO For service life other than 10 million cycles, the allowable stress numbers are adjusted by the use of stress cycle factors YN and ZN.
Method C supplies average values which can be used for industrial transmissions and gear systems with similar requirements in the following fields of application:. For the calculation of loss efficiency of the planet gearing, we will use the losses in the helical gearing carrier stopped with:.
Profile method — Rules and procedures for the assessment of surface texture ISOCalculation of load capacity of spur and helical gears — Part 2: ISO is designed to facilitate the application of future knowledge and developments, also the exchange of information gained from experience.
The system with the carrier connected to the frame is called a normal transmission or helical gearing. After securing function requirements, it is possible to further optimize corrections in order to improve one or more important toothing parameters.
Calculation of service life under variable load 3 Terms, definitions, symbols and abbreviated terms For the purposes of this document, the terms, definitions, symbols and abbreviated terms given in ISO and the following symbols apply. It also incorporates the Amendments ISO It is not intended for use by the general engineering public. From the frequently used optimizing methods, it is possible to optimize the toothing in order to balance specific slips [5.
The work hardening factor, Z W takes account of the increase in the surface durability due to meshing a steel wheel structural steel, through-hardened steel with a hardened or substantially harder pinion with smooth tooth flanks. Two or multi-speed planets have more constructional variants with wider possibilities; however, they are more complex and expensive to manufacture. Purchase the entire publication at the link below: ISO includes procedures based on testing and theoretical studies such as those of Hirt , Strasser  and Brossmann .
For the internal gearing ring geara negative value for the number of internal gear teeth is used, i. The three material quality grades ML, MQ and ME, stand in relationship to – ML stands for modest demands on the material quality and on the material 6363-2 treatment process during gear manufacture. Eh, IF, NT nitr.
You may find similar items within these categories by selecting from the choices below:. Parameters for the time-strength curves were obtained from ISO and 3. The formulae in ISO are not applicable when any of the following conditions exist: In downloading this file, parties accept therein the responsibility of not infringing Adobe’s licensing policy.
The values of Ro, E and Poisson 633-2 are commonly available.
isoo This second edition cancels and replaces the first edition ISO When determining values of corrections, first it is necessary to fulfill 6336–2 requirements for toothing, where the most important items include.
The loss coefficient can be approximately described according to the formula: Accept and continue Learn more about the cookies we use and how to change your settings. The procedures in ISO provide rating formulae for the calculation of load capacity, based on pitting and tooth root breakage.
Component of equivalent misatignment. The method B is suitable for all the types of spur gears. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.